NDLI: Role of polarity in de novo shoot bud initiation from stem disc explants of Curculigo orchioides Gaertn. and its encapsulation and storability

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Role of polarity in de novo shoot bud initiation from stem disc explants of Curculigo orchioides Gaertn. and its encapsulation and storability

Content Provider	Springer Nature Link
Author	Nagesh, Kallahally Sugnanachar Shanthamma, C. Bhagyalakshmi, N.
Copyright Year	2009
Abstract	The occurrence of strong polarity towards shoot bud induction and the effect of cytokinin(s) on each segment of stem axis, encapsulation and storability of de novo Shoot buds of Curculigo orchioides Gaertn. (Hypoxidaceae) have been documented in the present communication. Maximum number of shoot buds arising de novo from the stem discs (cross section) explanted from proximal end on MS medium fortified with BAP and KIN 1 mg/L each. Stem discs from distal end were less efficient in shoot bud induction. A combination of two cytokinins (BAP and KIN) as a synergistic effect on shoot buds induction from each segment of stem axis. Stem discs in inverted position produced shoot buds from the lower surface, showing strong polarity within the explant. Further, storability and shoot development of sodium alginate encapsulated shoot buds of Curculigo orchioides were tested on half-strength Murashige and Skoog (MS) basal medium fortified with coconut water (10% v/v). The frequency of regeneration from encapsulated shoot buds was affected significantly by concentration of sodium alginate and the duration of exposure to calcium chloride. Shoot buds encapsulated with 2.5% sodium alginate dissolved in MS basal salts solution recorded significantly higher shoot development than other treatments. A relatively short (5 min) incubation with calcium chloride solution provided uniform encapsulation of shoot buds that gave the highest percentage (68%) of shoot development. Encapsulated shoot buds could be stored at 4°C for 50 days without reduction in viability as oppose to non-encapsulated shoot buds, which showed 9.5% viability after 20 days at 4°C. Encapsulated shoot bud developed into normal shoots. Based on the present observations an improved protocol may be developed for the rapid multiplication and conservation of the endangered species—C. orchioides.
Starting Page	699
Ending Page	704
Page Count	6
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	31
Issue Number	4
e-ISSN	18611664
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-02-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Curculigo orchioides Hypoxidaceae Proximal stem disc De novo shoot buds Encapsulation storability Agriculture Plant Anatomy/Development Plant Pathology Plant Biochemistry Plant Genetics & Genomics Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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Role of polarity in de novo shoot bud initiation from stem disc explants of Curculigo orchioides Gaertn. and its encapsulation and storability